Application of Acid Modified CuO/Al₂O₃ Nanostructured Catalysts and its Cytotoxicity Assessment for Enhanced CH₄-SCR Performance

Abstract:

The effect of treatment with different inorganic acids (HNO₃, CH₃COOH, and H₃PO₄) on the activity of CuO/γ-Al₂O3 nanostructured catalysts selective catalytic reduction of NO by hydrocarbons (HC-SCR) using CH₄ as a reducing agent in a tubular fixed-bed reactor (TFBR) at temperatures from 623-1023 K in the presence of oxygen was studied. A CuO/γ-Al₂O3 nanostructured catalyst was prepared by incipient wetness impregnation approach of copper nitrate and γ-alumina support. The catalysts were characterized using AEM and XRD. The experimental results show that the support γ-alumina with a 6 N HNO₃ solution at the calcinations temperature of 873 K obvious promoting effects on the higher activity due to greater acidity of the transforming NO reaction over a CuO/γ-Al₂O₃ nanostructured catalyst, because the acidic pretreatment provides the acidic sites for the catalyst surface and improved the dispersion of copper species and the reactivity over the catalyst reaction system with NO-CH₄-O₂. Further, cell cytotoxicity and the percentage cell survival was determined by using MTS assay on human fetal lung tissue cell (MRC-5). The experimental results show that the nanoscale CuO/γ-Al₂O₃ catalyst only minor cause cytotoxicity effect in cultured human cells.

• Periodical: Materials Science Forum (Volume 695)
• Pages: 97-100
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.695.97
• Online since: July 2011
• Authors: Chang Mao Hung
• Keywords: Acid Modified, CuO/γ-Al₂O₃ Catalyst, Cytotoxicity, NO, Selective Catalytic Reduction (SCR), Tubular Fixed-Bed Reactor (TFBR)

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